Abstract: By means of this system, the interaction among spreadsheets is completely integrated within the Spreadsheet Management System whereas it does not require the usage of other tools supporting the communication over a network such as web browsers, mailers, and file transfer clients. The interaction is implemented by the Enabling Platform, integrated within the Spreadsheet Management System, and by the Service Platform, located on a computing system that can be reached over the Internet or on a different private network making the Service Platform's intervention not visible to users.